The Canon 1.4X EF Extender is a professional grade teleconverter designed exclusively for use with select Canon brand L-Series lenses (focal lengths over 135mm). Increasing the lens focal length by a factor of 1.4 times, Extender EF 1.4X incorporates incorporates careful lens placement and anti-reflective coatings for high quality optical 1. They don't fit. The adapters have a rectangular baffle inside that the RF protruding front element does not fit within. subtraho's gear list: Canon EOS R5 Canon EF 100mm F2.8L Macro IS USM Canon EF 500mm f/4.0L IS II USM Canon RF 24-105mm F4L IS USM Canon RF 100-500mm F4.5-7.1L IS USM +7 more. Reply Reply with quote Reply to thread Complain.
p.1 #3 · p.1 #3 · Canon 1.4 Extenders-Version II Vs Version III-Thoughts? The 1.4x III helps reduce CA with older lenses like the 500/4 IS and 300/2.8 IS. In general it's a bit sharper corner to corner. The 100-400 II is a fine lens, so I'd not hinder it with a 1.4x II just to save a few dollars.
I don't have an EF 500mm f/4 mk II lens on hand but there have been improvements to the results from the EF 1.4x III Extender. It is claimed that the microprocessor in the EF 1.4x III Extender promises faster AF speed and increased AF precision on the Canon EF 500mm f/4L IS II USM Lens. So yes, you should see an improvement with this lens.
In reply to BG454 • Mar 13, 2014. MisterBG wrote: I'm considering a 1.4x teleconvertor and I was looking for opinions and comments on the Canon EF 1.4 MkIII against the Kenko 300 DGX. Most use will be for wildlife, including BIF, and principally with the 70-200 F4L and 100-400 F4.5-F5.6L lenses on my 6D body.

EOS R6 - IBIS and LENS compatibility. GRIZZTAVIDZ. Apprentice. Options. 09-05-2020 04:25 PM. I ordered and received my R6 last week and am extremely happy with the handling, quality, AF performance and more. Because EF/RF adapers are hard to come by, I am working with a limited budget to pick up some RF options, in addition to my 24-105 Kit

Applicable when subject frame is shown while using +Tracking and RF lenses (except RF600mm F11 IS STM / RF800mm F11 IS STM and Extender RF), EF lenses (excluding some current products), EXTENDER EF (III) (depends on master lens AF area mode). Some scenes and subjects may not be applicable.
Owntku.
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    • canon extender ef 1.4 x ii lens compatibility